Pump.



V. H. FRANCIS.

PUMP.

APPLICATION FILED IuNE 2a. I9I7.

Patent-.ed Nov. 12, 1918.

INvIsN'roR UNITED STATES PATENT OFFICE.

VINCENTl H. FRANCIS, or` DRUMRIGHT, OKLAHOMA, AssrcrNoR` To VLRIcK-REIDVSUPPLY COMPANY, or PITTSBURGH, PENNSYLVANIA, A CORPORATION. or

PENNSYLVANIA.

PUMP.

To yall lwjwm z't may concern:

. Be it known that I, VINCENT H. FRANCIS, a citizen of the UnitedStates, and resident ofl Drumright, in the county of Creek and State ofOklahoma, have invented a new; and useful Improvementl in Pumpsyand I doherebyy declare the. following to be a full, clear, and eXactdescription thereof.

My invention relates to` pumps for oil; or like wells, andhas-particular reference ,to a type of pumpsuchl asdescribed in myapplication for Letters Patent, Serial No. 176,55led of even datekherewith.

-In the present invention Il provide a double-acting pump oiE the samevgeneral character in which the pumped supply of fluid tothe chambervabove the piston, is not dependent on suction of the piston onitsdownward movement, the arrangcinentgfoat thev structure permitting morerapid operation which gives they inventionV special advantage for useinpumping slow-flowing wells.

In theaccompanying drawing, Figurel is a longitudinal sectional view ofmy improved' pump; and Fig. 2 is an `enlarged longitudinal' sectionalvienT of one oft-the check-valves employed.

My improved pump comprises the working-barrel or pumping-cylinder 3having at its lower end an anchor tube and strainerv 4,. and having atits upper end4 the stufiing-box 5.

The pump is connected to the well-tubing (not shown) preferably by atubelikemember 6 which is coupled to the well-tubing and connects to theworking-barrel by a coupling 7, said coupling forming also a seat forsupporting the stuting-box. The workingbarrel has the standing valve 8and the travcling-valve or piston 9. The valve and the piston beingpreferably of standard form and arranged to function in a manner commonto ordinary pumping outits, the piston A in this instance beingconnected to the operating cable or rods (not shown) byl a valve-r0d10-which passes through the stuifing-box 5.

Admission'of iuid to the working-barrel beneath the piston is by valve8y and-by a by-pass pipe connection 11. This by-pass connects with theanchortube below the strainer openings at 1 1al and to theworkingbar-rel" above the valve 8 at `11", a down wardly-seating check12 preventing return iiow of fluid through this pipe. Thisarspecification f Letters Patent. patented-1v0v, 12,-1918,

Application ii1edJune23, 1917. I

SeraLNo. 176,155.7.

rangement of the byfpass afordsraddtiQIlaL of the byfpassto theanchortube iswell to-y ward thevbottom of saiditubeandlprovides forvsupply of the fluid.tofthelchamber s o long as there isfiiuidinthewell.

The iuid escape openingsflom Ohechamber beneath the piston comprisethevalve opening of'` piston-valve 9a, and thel inlet opening 1lb ofthexby-pass '11.

, Anextension llfof` the bye-pass 11: communicates with? the opening 11"in .billet-barrel and with the ,connectingmember 6, of the Well-tubingand has l the downwardly-,seating check-valve 18 which; opens on theydownward movement of the piston.

Chamber 3a communicates` by a byfpass pipe14 with the source Offluidsupply,A andl an extension 14a ofthis pipe, connects the chamber withthe well-f tiubing, check-valves 15. and: 16l controlling flowl offluidl `through these pipes, respectively.

The operation ofy thepumpis asf-follows: Downwardl movement, of theVpiston :forces fluid from the barrel beneath they piston through theopening 1'1h into-theI ,byfpass pipe 11, valve 12 ofv theby-pass 11closing due to the pressure of fluidcreated by the descending piston,ythe f uidpassing through pipe 11 into the extension 6 whichcommunicates with the well-tubing. During the downward movement ofthepiston a portion ofthe fluid beneath the piston passes through thevalve. 9? and into the chamber 8a of' theworking-barrelV above thepiston, and in this manner the piston is V, relieved of compression to aconsiderableextent on its downward stroke, while at the same `time thevalve 9a providesy means for supplying the chamber 3@ with fluidior'displacement by the piston omitsupward movement.

The function-of the iby-pass 14, isto supply fluid to chamber 3a' forpumping-displacement bythe upstroke'. of the, piston when the'` headpressure offthewell'issuch as to cause the Huid to rise1 or standin thispipe so as to communicate with the chamber through its opening 141.

Upward movement: of the piston displaces the Huid from the chamber 3athrough opening 14b and forces it throughthe extension 141- into theconnection 6, the check-valve 15 of the pipe 14 closing due to the fluidpressure in the pipe l-l caused by the ascending piston, check-valve 16preventing return of fluid to the chamber at the completion of theupstrole.

With the structure here shown and described, it will be seen that I haveprovided a double acting pump having a single piston in which fluid fromthe source is conveyed to the barrel at opposite sides of the piston bypassages which are independent of' the admission valve 8, which providefor large capacity in pumping a fast flowing well, and which provide fora supply of fluid to the barrel for pumping displacement by the pistonin either direction of its movement even when fluid in the well is tooshallow to be eliected by suction of the piston through the standingvalve 8.

jWhat l claim is:

l. A pump for cil or other deep wells comprising a pump cylinder, asingle piston in the cylinder for suction and for expulsion of fluid toand therefrom, respectively, a plurality of inlets each having separatesource of communication with the source of fluid supply andcommunicating with the cylinder at opposite sides of the piston, aphirality of outlets, and means for transferring a portion of the fluidof the cylinder at one side of the piston to the opposite side fordisplacement from the cylinder by movement of the piston.

2. A pump for oil or other deep wells comprising a pump cylinder, asingle piston in the cylinder for suction and for expulsion of fluid toand therefrom, respectively, a plurality of inlets each having separatesource or" communication with the source of iluid supply andcommunicating with the cylinder at opposite sides of the piston, aplurality of outlets. and a passage for fluid interiorly of the cylinderforming communication between said inlets l.from opposite sides of thepiston.

3. A pump for oil or other deep wells comprising a pumping cylinder, asingle piston for simultaneous suction and expulsion of i'iuid from thecylinder, a plurality of inlets having separate sources of communicationwith the source of fluid supply, a plurality of outlets, said inlets andoutlets being valve-controlled, a valved connection for the fluid oivthe cylinder communicating at opposite sides of the piston through whicha portion of the fiuid at one side of the piston is transferred to theopposite side for expulsion from the cylinder by movement of' thepiston.

4;. A pump for oil or other deep wells comprising a pumping cylinder, asingle piston for simultaneous suction and expulnannesz sion of fluid toand from the cylinder, rcspectively, a plurality of inlets each havingseparate source of communication with the source of fluid supply forsupplying fluid to the cylinder at one side of the piston, said inletsincluding a valve at one end of the cylinder, a fluid connectioncommunieating with the source of fluid supply at the opposite side ofthe piston, said inlets being valve-controlled, valve-controlledoutlets, and a valve-controlled passage interiorly of the cylinder forconveying fluid in the cylinder from one side of the piston to theopposite side for expulsion from the cylinder by movement of the piston.

5. A pump for oil or other fluids comprising a pumping cylinder closedat one end by a stuffing-box and having a valvecontrolled opening in theopposite end, a single piston operable in the cylinder for suction andfor expulsion of fluid to and therefrom, respectively, the piston rod ofthe piston operating through said stuifingboX, a plurality of inlets forthe cylinder each having separate source of communication with thesource of fluid supply, said inlets including the valve in the end ofthe cylinder, a plurality of outlet connections, said inlets and saidoutlets intercommunieating and being valve-controlled, and acommunicating passage between the oppositev chambers of the cylinderformed by the piston adapted for conveying fluid for eX- pulsion fromone of the chambers by movement of the piston.

6. A pump for oil or other fluids comprising a pumping cylinder closed.at one end by a stuffing-box and having a valveclosed opposite end, asingle piston in the cylinder operated by a piston-rod passing throughsaid stuliing-box, fluid inlets comprising the valve in the cylinder andbypass connections each having separate communication with the source offluid supply, and communicating with the cylinder at opposite sides ofthe piston, fluid outlets comprising pipe connections communicating withsaid inlets.y said inlets and outlets being valve controlled operable bymovement of the piston, said piston having a passage for conveying fluidfrom one side of the piston to the other on movement of the piston inone direction for displacement by thrust of the piston in the oppositedirection, and a valve controlling said passage.

In testimony whereof l, the said VrNCnN'r H. FRANCIS, have hereunto setmy hand.

V. H. FRANClS.

Witnesses:

GRACE Hoo'ron, MABEL HERMES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, E. C.

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